Jack



H.` MAINQ Oct. 28 i924.

JACK

Filed March 19, 1923 l; Ik, y

.w www j poen to@ ?atente d @ich 28, 1924.

:` Manto, or Jackson, MICHIGAN.

maan

JACK.

Application mea March 1a, 192s.- .seriai No. 626,029.'

. To' all whom t may concern.'V

Beit known that I, HARRY Manto," a citizen of the United States of' America, re- 'sidin and tate of Michigan, have invented cer.-

tain newand usefullmprovements in'Jacks,

'of which the following is a specification,

reference being had therein to the accompanying drawings.vv

This invention relates to lifting jacks -for automobile and other uses, and it has for,

its principal object to provide a device which may be quickly set to any desired posltion with respectto the Aload and then opv,1li erated by a crank or equivalent means for lifting the load.

Anotherobject of the invention is the provision of a form of base whereby the heiglft ofthe jack may be quicklyvaried within 2,9 wide limits to adapt the jack for high or low axles or other loads.

l `Other andd further objects will appear in connection with the v'accom anying speciication, reference being ha to the drawing2` forming a portion thereof, in whichigure 1 is. a" vertical section 'of a pre* ferred embodiment of the invention;

' Fig. 2 is a section at right angles to that of Flg. 1, and;

Fig. 3 is a horizontal section on-'theline lll-HI of Fig; 1. The Ibase of t e jack is represented by the numeral l, and preferably consists of a hollow casting having recesses 2 at each-.side to .receive and to gulde the lugs 3 formed upon a hollow barrel 4. Near the upper end of the base member lare formed a pair of openings 5, 5, adapted for the reception of .a fU-shaped su porting member 6, the 4@ parallel arms of which are of a size adapted to be inserted between the lugs 3 to hold the barrel 4 in any desired position of vertical '.adjustment.

-An arm 7 preferablyformed as an in- A y tegral partf of the barrel 4 extends outward from one side of the barrel andupward, v Ming formed with a cylindrical perforation 8 which is in .line with a corresponding perforaticn 9 `formed within the uppalaspor-4 59 tion of vthe barrel, the perforations 8 and 9 act as bearings for a shaft 10. Upon the 1art1() is secured a bevel gear 11 which engages a bevel gear 1'2- internally screwthreaded .to receive a buttress screw 13 ar ally ofthe barrel 4. Upon,

at Jackson, in the count of Jackson.

the necessary strength.

u lower end of the screw 18 is secured a guide block .14 which is of a suitable size to vslide freely within the non-circular hollow interior of the barrel 4 `to prevent rotation ofh the screw 13. Within the upper end of the barrel 4 is formed'a recess 15 which re ceivesa thrust bearing 16 upon which rests the lower face of the bevel gear 12. A load carrying head or plate 17 is mounted upon the upper end of vthescrew 13. The outer end of the shaft 10 isi-squared or otherwise shaped at- 18 to receive a crank or other form of'operating means by which the shaft 10 may be rotatedto cause rotation of the gears 11 and 12. A sheet metal plate 19 is` secured as by rivets 2O upon the lower end ofthebase 1 to close the opening and thus t'o prevent dirt, stones or other lmatter from interfering withthe free movement of the barrel 4. A late 'l5 of sheet'metal will obviously be less likely to break than a cast metal base' of corref l sponding thickness. The use of sheet metal aids in securing lightness while providing esV The operation of the device will be obvious from the description. The jack will be placed in position beneath' the axle or other load to be lifted, and with the vlishaped support 6 Awithdrawn out of enga ement with the lugs 3, the barrel 4 may be ited, usin the cam 7 as a. handle, until the head 1 engages the object to be lifted. The support 6 will thenbe slid beneath the lug 3 which lies above thev opening 5, the barrel 4 being raised or lowered to permit the insertion of the support 6 entirely across 4the' channels 2.' vThe operating .means will then be applied .-to the non-circular end of the shaft 10 and rotated to cause the gear 12 to rotate about the screw 13 and thereby lift Y the screw and its head 17 to engage the load and raise it, to any desired, oint. In this screw may be available forlifting after the barrel. has.' been adjusted to. the greatest available height beneath the load to boli .v

AWVhile' I have described a s ecifie ;dev I embodying m invention, it l bea-'obvious that many C l. y

7 from fallo prlnoplo involved or soorloimg only of its mlvommgosf lll, is Ihhofoioo ibo llo umdorsfcooml iblnoftho invention ls moo tml to the spoollo (lofolo sloom, bul il: is olomodl in any of its 'onms ou? mosllooitioms within olio logilimoo ood 'Valid scopo o' tho op pounded olmm.1 v

l claims-w Aijoolg oomgoloi Walls tlloloof mmgofl lomgllzu lool grooves; looml having spaced logs sliolololo im tho gfoovos of the hollow basso, ovhoolzooolly disposed U-shopool o hollow loose lowing sulppollim tho oppor @ml of sold loos@ ood homing pomllol pofoms ooloptod lo lao plooool lootwoom fallo loomol ,lugo whereby fullo @l Eo'wlool with ooposiloly om.

www@

-loolml may loo supponloal ino voslous )positions of ocljusimonfn longitudinally of fallo boso, om olmo om sold loowol extending out off soiml loos@ to facilitato shifting sold bom'ol im sold loos@g o sooow slidololo ,lomgaudinolly of tho looorol9 a rotoioblo mambo? im sowoloodofl omgogomont wlfsll sold soow amil Suppotofl by soid'loamoL omo, moons s uppofloxl by sono om and bowel for rotating sold momloor to (zo-uso movomom' of fallo] screw loogltudmolly of olmo loom-ol. ,1

v l HARRY MAlN,

Wifnesoos: v w

Amo-xm Mmmom ANNA M, Bom., 

